Specification :

MTL01: Montelukast ( Acid)

1-[ 1-[ [ [ ( 1R) -1-[ 3-[ ( 1E) -2-( 7-Chloro-2-quinolinyl) ethenyl] phenyl] -3-[ 2-( 1-hydroxy-1-methylethyl) phenyl] propyl] thio] methyl] cyclopropaneacetic acid
[ CAS # 158966-92-8]

MTL02: Montelukast Sodium [ CAS # 151767-02-1]

MTL03: 2-( 2-( 3S-( 2-( 7-chloro-2-quinolinyl) - ethenyl-phenyl) -3-hydroxy-propyl) phenyl) -2-propanol
[ CAS # 142569-70-8]

MTL04: 3-( Mercaptomethyl) cyclopropane acetic acid [ CAS # 162515-68-6 ]

MTL05: 2-( 3S-( 2-( 7-chloro-2-quinolinyl) -ethenyl-phenyl) -3-hydroxy-propyl) -1-methoxy carbonylbenzene
[ CAS # 142569-69-5; 181139-72-0]

MTL06: 2-( 3-( 2-( 7-chloro-2-quinolinyl) -ethenyl-phenyl) -3-oxo-propyl) -1-methoxycarbo nylbenzene
[ CAS # 133791-17-0; 149968-11-6]

MTL07: Montelukast Sulfoxide

Synonym: Montelukast USP RC A ; Montelukast S-Oxide

CAS Name: [ 1-[ [ [ 1-[ 3-[ ( E) -2-( 7-chloroquinolin-2-yl) ethenyl] phenyl] -3-[ 2-( 2-hydrox-ypro pan-2-yl) phenyl] propyl] sulfinyl] methyl] cyclopropyl] acetic acid.
[ CAS # 909849-96-3]

MTL08: Montelukast Sulfone

MTL09: Montelukast cis Isomer

Synonym: Montelukast USP RC B

CAS Name: [ 1-[ [ [ ( 1R) -1-[ 3-[ ( Z) -2-( 7-chloroquinolin-2-yl) ethenyl] phenyl] -3-[ 2-( 2-hydrox ypropan- 2-yl) phenyl] propyl] sulfanyl] methyl] cyclopropyl] acetic acid.
[ CAS # 774538-96-4]

MTL10: Montelukast Methylketone Impurity

Synonym: Montelukast USP RC E

CAS Name: [ 1-[ [ [ ( 1R) -3-( 2-acetylphenyl) -1-[ 3-[ ( E) -2-( 7-chloroquinolin-2- yl) ethenyl] phenyl] propyl] sulfanyl] methyl] cyclopropyl] acetic acid.
[ CAS # 937275-23-5]

MTL11: Montelukast Methylstyrene Impurity

Synonym: Montelukast USP RC F ; Anhydro Montelukast ; Dehydro Montelukast

CAS Name: [ 1-[ [ [ ( 1R) -1-[ 3-[ ( E) -2-( 7-chloroquinolin-2-yl) ethenyl] phenyl] -3-[ 2-( prop-1-e n-2- yl) phenyl] propyl] sulfanyl] methyl] cyclopropyl] acetic acid.
[ CAS # 918972-54-0]

MTL12: Montelukast Hydroxy Metabolite

1-[ 1-[ [ [ ( 1R) -1-[ 3-[ ( 1E) -2-( 7-Chloro-2-quinolinyl) ethenyl] phenyl] -3-[ 2-( 1, 2-diol-2-methylethyl) phenyl] propyl] thio] methyl] cyclopropaneacetic acid
[ CAS # 186352-97-6]

MTL13: Montelukast Disulfide Impurity

MTL14: Montelukast Ether Impurity [ CAS # 168214-67-3]

MTL15: Montelukast Dicyclohexylamine [ CAS # 577953-88-9]

MTL16: Montelukast Dihydro Impurity

( 1R) -1-[ [ [ 1-[ 3-[ 2-( 7-Chloro-2-quinolinyl) ethyl] phenyl] -3-[ 2-( 1-hyd roxy-1-methylethyl) phenyl] propyl] thio] methyl] cyclopropaneacetic Acid
[ CAS # 142147-98-6 for sodium salt]

MTL17: Montelukast Lactone